CN103358914B

CN103358914B - Direct current transducer for vehicle is diagnosed

Info

Publication number: CN103358914B
Application number: CN201310110282.6A
Authority: CN
Inventors: J.S.理查兹; D.P.格伦; V.A.诺瓦克
Original assignee: GM Global Technology Operations LLC
Current assignee: GM Global Technology Operations LLC
Priority date: 2012-03-30
Filing date: 2013-04-01
Publication date: 2016-04-13
Anticipated expiration: 2033-04-01
Also published as: DE102013203274B4; DE102013203274A1; CN103358914A; US20130261883A1; US8688318B2

Abstract

The direct current transducer that the present invention relates to for vehicle is diagnosed, and direct current (DC) conv specifically provided as hybrid power and non-mixed power car provides the method for diagnosis, program product, hybrid power and non-mixed power car.Described vehicle comprises driving engine, chargeable energy storage system (RESS), direct current (DC) conv and controller.Described driving engine opens and closes based on chaufeur input automatically according to auto-stop feature.Described RESS at least can open described driving engine.Described DC conv is connected to described RESS.Described controller is connected to described DC conv, and be configured to determine described driving engine state, from described DC converter accepts DC transducer voltage value and based on described engine condition, RESS voltage and described DC transducer voltage for described DC conv provides diagnosis.

Description

Direct current transducer for vehicle is diagnosed

Technical field

The present invention relates in general to vehicular field, relates more specifically to the method and system of the diagnosis for performing vehicle DC (DC) conv.

Background technology

Nowadays hybrid power and non-mixed power car comprise chargeable energy storage system (RESS) (such as low pressure 12 volts or high pressure 360 volts of batteries) and driving engine (such as explosive motor).At vehicle stopping period (such as, when parking sign or parking light place), vehicle automatically can kill engine and adopt RESS power exclusively, and uses RESS power again automatically to open driving engine subsequently when vehicle continues mobile.This is referred to herein as the auto-stop feature of vehicle.In order to help voltage fluctuation during stable automatic fire an engine, vehicle can adopt direct current (DC) conv, described direct current (DC) conv automatically during starts promoting and stablizing the voltage of RESS at driving engine.Because the indispensability of DC conv in suitable vehicle operation participates in, may expect for this DC conv provides diagnosis.

Correspondingly, expect to be provided as the method that vehicle DC conv provides the improvement of diagnosis.Also expect to be provided as program product and the system that the DC conv adopted in vehicle provides the improvement of this diagnosis.In addition, technical field in conjunction with the drawings and above and background technology consult detailed description subsequently and claims, and other desired characters of the present invention and characteristic will become clear.

Summary of the invention

According to illustrative embodiments, provide a kind of for providing the method for diagnosis for vehicle DC (DC) conv, described vehicle has the driving engine automatically opened and closed based on chaufeur input according to auto-stop feature.Described method comprise determine driving engine state, provide diagnosis from DC converter accepts DC transducer voltage value and based on the state of driving engine and DC transducer voltage by treater.

According to another illustrative embodiments, provide a kind of program product being vehicle DC (DC) conv and providing diagnosis, described vehicle has the driving engine automatically opened and closed based on chaufeur input according to auto-stop feature.Described program product comprises program and non-provisional computer-readable recording medium.Described application configuration become at least can: determine the state of driving engine, provide diagnosis from DC converter accepts DC transducer voltage value and based on engine condition and DC transducer voltage.Non-provisional computer-readable recording medium storing said program.

According to further illustrative embodiments, provide a kind of vehicle.Described vehicle comprises driving engine, chargeable energy storage system (RESS), direct current (DC) conv and controller.Described driving engine opens and closes based on chaufeur input automatically according to auto-stop feature.Described RESS at least can open described driving engine.Described DC conv is connected to described RESS.Described controller is connected to described DC conv, and be configured to determine described driving engine state, from described DC converter accepts DC transducer voltage value and based on described driving engine and described DC transducer voltage for described DC conv provides diagnosis.

Scheme 1.a kind of being used for is the method that vehicle DC (DC) conv provides diagnosis, and described vehicle has the driving engine automatically opened and closed based on chaufeur input according to auto-stop feature, and described method comprises:

Determine the state of described driving engine;

From described DC converter accepts DC transducer voltage; And

Diagnosis is provided by treater based on the state of described driving engine and described DC transducer voltage.

Scheme 2.method as described in scheme 1, wherein said vehicle comprises chargeable energy storage system (RESS) further, and described method comprises further:

Measure RESS voltage, wherein provide the step of diagnosis to comprise and provide diagnosis based on DC transducer voltage with comparing of RESS voltage when driving engine is in steady-state condition.

Scheme 3.method as described in scheme 2, comprises further:

If be greater than predetermined threshold based on the described absolute value comparing the difference determined between DC transducer voltage and RESS voltage, then forbid auto-stop feature.

Scheme 4.method as described in scheme 3, comprises the steps: further

Repeat described comparison for multiple light-off period, thus generate and multiplely formerly to compare; And

Multiplely the predetermined threshold adjusting following light-off period is formerly compared based on described.

Scheme 5.method as described in scheme 1, wherein:

The step receiving DC transducer voltage be included in automatic engine after automatic engine stops during starts, within the time period that engine starting and DC conv provide voltage to promote, receive multiple DC transducer voltage value; And

Diagnosis is provided based on the difference between DC transducer voltage value during providing the step of diagnosis to be included in the described time period.

Scheme 6.method as described in scheme 5, wherein said method comprises further:

If the absolute value of the difference between DC transducer voltage value is greater than predetermined threshold, then forbid auto-stop feature.

Scheme 7.method as described in scheme 1, wherein said vehicle comprises chargeable energy storage system (RESS) further, and described method comprises further:

Measure RESS voltage, wherein provide the step of diagnosis to comprise first time during the current light-off period of driving engine at vehicle and provided diagnosis based on DC transducer voltage with comparing of RESS voltage by during starting.

Scheme 8.method as described in scheme 7, comprises further:

Scheme 9.a kind of program product being vehicle DC (DC) conv and diagnosis is provided, described vehicle has the driving engine automatically opened and closed based on chaufeur input according to auto-stop feature, and described program product comprises:

Program, described application configuration become at least can:

Determine the state of described driving engine;

From described DC converter accepts DC transducer voltage; And

Diagnosis is provided based on engine condition and DC transducer voltage; And

The non-provisional computer-readable recording medium of storing said program.

Scheme 10.program product as described in scheme 9, wherein said vehicle comprises chargeable energy storage system (RESS) further, and described program be configured to further at least can:

Measure RESS voltage;

Diagnosis is provided based on DC transducer voltage with comparing of RESS voltage when driving engine is in steady-state condition; And

Scheme 11.program product as described in scheme 9, wherein said program be configured to further at least can:

Automatic engine after automatic engine stops during starts, at driving engine is received multiple DC transducer voltage value by time period of starting;

Diagnosis is provided based on the difference between DC transducer voltage value during the described time period; And

Scheme 12.program product as described in scheme 9, wherein said vehicle comprises chargeable energy storage system (RESS) further, and described program be configured to further at least can:

Measure RESS voltage;

During the current light-off period of driving engine at vehicle, first time is provided diagnosis based on DC transducer voltage with comparing of RESS voltage by during starting; And

Scheme 13.a kind of vehicle, comprising:

Driving engine, described driving engine opens and closes based on chaufeur input automatically according to auto-stop feature;

At least can open the chargeable energy storage system (RESS) of described driving engine;

Be connected to direct current (DC) conv of described RESS; And

Controller, described controller is connected to described DC conv and is configured to:

Determine the state of described driving engine;

From described DC converter accepts DC transducer voltage; And

Based on described driving engine and described DC transducer voltage for described DC conv provides diagnosis.

Scheme 14.vehicle as described in scheme 13, wherein said controller is configured to further:

Measure RESS voltage; And

Diagnosis is provided based on DC transducer voltage with comparing of RESS voltage when driving engine is in steady-state condition.

Scheme 15.vehicle as described in scheme 14, if wherein said controller is configured to be greater than predetermined threshold based on the described absolute value comparing the difference determined between DC transducer voltage and RESS voltage further, then forbids auto-stop feature.

Scheme 16.vehicle as described in scheme 15, wherein said controller is configured to further:

Scheme 17.vehicle as described in scheme 13, wherein said controller is configured to further:

Automatic engine after automatic engine stops during starts, at driving engine is received multiple DC transducer voltage value by time period of starting; And

Diagnosis is provided based on the difference between DC transducer voltage value during the described time period.

Scheme 18.vehicle as described in scheme 17, if the absolute value of difference that wherein said controller is configured between DC transducer voltage value is further greater than predetermined threshold, then forbids auto-stop feature.

Scheme 19.vehicle as described in scheme 13, wherein said controller is configured to further:

Measure RESS voltage; And

Diagnosis is provided based on DC transducer voltage with comparing of RESS voltage when first time starts during the current light-off period of driving engine at vehicle.

Scheme 20.vehicle as described in scheme 19, if wherein said controller is configured to be greater than predetermined threshold based on the described absolute value comparing the difference determined between DC transducer voltage and RESS voltage further, then forbids auto-stop feature.

Accompanying drawing explanation

Subsequently the accompanying drawing combined below is described the present invention, wherein similar Reference numeral indicates similar element, and in accompanying drawing:

Fig. 1 is the functional block diagram of the vehicle of the control system comprising driving engine according to illustrative embodiments and control described driving engine, and described vehicle also comprises chargeable energy storage system (RESS), direct current (DC) conv and electronic control system;

Fig. 2 is the functional block diagram of the control system of Fig. 1 according to illustrative embodiments;

Fig. 3 is the diagram of circuit providing the program of diagnosis according to illustrative embodiments for the DC conv of the DC conv-such as Fig. 1 and 2 for vehicle, and this program can use the control system of Fig. 1 and 2 and the vehicle of Fig. 1 to implement; And

Figure 4 and 5 provide the schematic diagram of the enforcement pattern providing the program of Fig. 3 of dissimilar diagnosis for DC conv according to illustrative embodiments.

Detailed description of the invention

Detailed description is below only exemplary in essence, and not intended to be limiting the present invention or its application and purposes.In addition, protection scope of the present invention should not be subject to aforementioned background art or below detailed description of the invention in the restriction of any theory that provides.

Fig. 1 shows vehicle 100 according to illustrative embodiments or automobile.As below further in greater detail, vehicle 100 comprises direct current (DC) conv 102 and provides the control system 104 of diagnosis for described DC conv 102.

Although be described as vehicle in the exemplary embodiment, but vehicle 100 can be any one in the automobile of number of different types, the car of such as hybrid power or non-mixed power form, lorry, truck or sport utility vehicle (SUV), and can be two-wheel drive (2WD) (that is, back-wheel drive or f-w-d), four wheel drive (4WD) or a11wheel drive (AWD).Vehicle 100 can also be equipped with the combination of any one or they in the propulsion system of number of different types, such as gasoline or diesel fueled combustion driving engine, " FFVs " (FFV) driving engine are (namely, use the compound of gasoline and ethanol), gaseous compound (such as, hydrogen or natural fuels) engine fuel, combustion engine/electric motor hybrid engine and electrical motor.

In the example embodiment shown in fig. 1, vehicle 100 is hybrid electric vehicle (HEV), and comprise actuator 120, chargeable energy storage system (RESS) 122, power inverter assembly (or inverter) 126 and cooling vessel 128 further, they are each is arranged in the body 114 of vehicle 100.Actuator 120 comprises at least one propulsion system 129 be arranged on chassis 112, and at least one propulsion system 129 described drives wheel 116.In the embodiment shown, actuator 120 comprises explosive motor 130 and motor/generator (or motor) 132.One of ordinary skill in the art should be understood that, electrical motor 132 comprising change-speed box, although and not shownly also comprise stator module (comprising conductive coil), rotor assembly (comprising ferromagnetic core) and cooling fluid or cooling system conditioner.As usually understood, the stator module in electrical motor 132 and/or rotor assembly can comprise multiple electromagnetic pole.

Consult Fig. 1 again, combustion engine 130 and electrical motor 132 become one, so as in them one or both be mechanically coupled at least some wheel 116 by one or more axle drive shaft 134.In one embodiment, vehicle 100 is " cascaded H EV ", and wherein combustion engine 130 is not directly connected to change-speed box, but is connected to electrical generator (not shown), and described electrical generator is used for providing power for electrical motor 132.In another embodiment, vehicle 100 is " HEV in parallel ", and wherein combustion engine 130 is directly connected to change-speed box by the axle drive shaft such as making the rotor of electrical motor 132 and be connected to combustion engine 130 rotatably.

RESS122 is arranged on chassis 112, and is electrically connected to inverter 126.RESS122 preferably includes the battery with stacks of cells.In one embodiment, ESS122 comprises lithium ion phosphate battery, such as nano phosphate lithium ion battery.RESS122 provides the drive system of propelled vehicles 100 together with electronics propulsion system 129.

In an illustrative embodiments, (shown in Fig. 1) vehicle motor 130 is unique driving power sources (not having electrical motor or power inverter module).This embodiment describes non-mixed power car.In this embodiment, RESS122 is plumbic acid 12 volts of batteries, and the supply of described plumbic acid 12 volts of batteries opens starter motor and energy needed for fire an engine.RESS also carrys out support vehicle electrical load by self or in conjunction with electric generator of vehicle subsystem.

Electronic control system (ECS) 118 comprises the engine control module (ECM) for explosive motor 130.ECS118 is preferably a part for the control system 104 of control combustion driving engine 130.Particularly, ECS118 when vehicle stops (such as, at traffic lights place) control combustion driving engine 130 cuts out (or stopping) automatically, and when chaufeur input instruction vehicle is mobile by continuation, use opens (or again starting) driving engine again automatically from the power of RESS122.Along with DC conv 102 opened automatically by combustion engine 130, the voltage of RESS122 is raised, to keep constant potential-preferably to equal the amount of the RESS122 voltage just in time before the automatic starting of combustion engine 130 starts at this time durations.Do not have DC conv 102, voltage will along with RESS122 partially draining and declining when starting combustion engine 130.ECS118 also provides diagnosis for DC conv 102, and preferably adopts the step of the program 300 described below in conjunction with Fig. 3-5 to provide suitable action (such as provide suitable alarm when diagnosing out DC conv 102 to there is fault and do not allow combustion engine 130 selectivity to close) based on described diagnosis.ECS118, DC conv 102 and RESS122 are shown in Figure 1 for a part for above mentioned control system 104, directly describe described control system 104 in more detail below in conjunction with Fig. 2.

Consult Fig. 2, provide the functional block diagram of the control system 104 for Fig. 1 according to illustrative embodiments.Control system 104 is connected to the driving engine 130 (not shown in Fig. 2) of Fig. 1.As shown in Figure 2, control system 104 comprises the DC conv 102 of above mentioned RESS122, ECS118 and Fig. 1, and for the starting relay 202 of explosive motor 130 (see Fig. 1), ignition lock 204, one or more RESS sensitive loads 206 and notification unit 208.RESS sensitive loads 206 comprises the Vehicular system of the function had the operation voltage sensitivity that RESS122 provides, the headlight of such as vehicle, panel lamp, radio receiver, navigationsystem and automatic window (only listing wherein several above).

When the vehicle ignition cycle starts, by the chaufeur ignition switch 204 of vehicle.ECS118 uses the power from RESS122 to start the driving engine 130 of Fig. 1 by starting relay 202.Subsequently; when chaufeur input show the auto-stop of driving engine be just when time-such as when vehicle stop (such as; determine when the brake pedal that chaufeur throws off accelerator pedal or engaged with vehicle reaches predetermined time amount) time; auto-stop feature (such as, according to the program of ECS118) according to vehicle makes driving engine automatically close.In some embodiments, chaufeur input can comprise close to the speed of 0 (or being less than predetermined threshold), close to representing the engine revolution of predetermined threshold of idling conditions and/or other show or confirm the parameter of driver intention.

When vehicle continues mobile (such as, determining when chaufeur disengage brake pedal or joint accelerator pedal reach predetermined time amount), driving engine uses and again again automatically opens similarly from the power of RESS122.Along with driving engine automatically starts in this way, DC conv 102 makes to raise from the voltage of RESS122, to provide constant potential (preferably equaling the voltage of the RESS122 in the moment just in time before driving engine starts automatically to restart) for RESS sensitive loads 206.

As shown in Figure 2, DC conv 102 comprises sensor array 210, transceiver 212 and control unit 214.Sensor array 210 comprises one or more voltage sensors 211 of the voltage measuring DC conv 102.Transceiver 212 transmits the magnitude of voltage measured by voltage sensor 211 to ECS118 by the communication bus 201 of vehicle.The magnitude of voltage of transmission preferably includes the output voltage of DC conv 102.Control unit 214 is connected to sensor array 210 and transceiver 212.Control unit 214 instructs the operation of DC conv 102, the measurement comprising voltage sensor 211 and the data transfer undertaken by transceiver 212.

In the embodiment shown, control unit 214 comprises treater 216 and memory device 218.In the exemplary embodiment, control unit 214 also comprises the various parts of the computer system being similar to ECS118 described below, comprises interface, bus and memory storage.Treater 216 performs calculating and the controlling functions of control unit 214, and can comprise the treater of any type or the single integrated circuit of multiple treater, such as microprocessor or collaborative work to realize IC apparatus and/or the circuit card of any right quantity of the function of processing unit.During operation, treater 216 performs the one or more programs 225 be included in memory device 218, and so, controls the overall operation of the computer system of control unit 214 and described control unit 214.

Memory device 218 can be the suitable memory device of any type.It will comprise the dynamic random access memory (DRAM) (DRAM) of such as various types of such as SDRAM, various types of static RAM (SRAM) (SRAM) and various types of nonvolatile memory (PROM, EPROM and flash memory).In some examples, memory device 218 is positioned at and/or is cooperatively positioned on identical computer chip with treater 216.In the embodiment shown, memory device 218 stores above mentioned program 225.

ECS118 is connected to DC conv 102 by communication bus 201.In the exemplary embodiment, ECS118 provides the diagnosis to DC conv 102.When ECS118 determines DC conv 102 et out of order, ECS118 is forbidden auto-stop feature and is provided alarm (can comprise the audio portion causing vehicle driver's attention) by notification unit 208.ECS118 is connected to notification unit 208 by communication bus 201 and/or direct electrical connection 260.ECS118 preferably performs these function according to the step of the program 300 described further combined with Fig. 3-5 below.

As shown in Figure 2, ECS118 comprises sensor array 230, transceiver 232 and controller 234.Sensor array 230 comprises one or more driver input sensor 231 and one or more voltage sensor 233.Driver input sensor 231 measures chaufeur input, and described chaufeur input is used for triggering the automatic closedown (stopping) of driving engine by the auto-stop feature of driving engine and opening (starting).In a this example, driver input sensor 231 comprises accelerator pedal sensors and/or brake pedal sensor.In various embodiments, also can use other sensors of such as vehicle-wheel speed sensor, engine sensor and/or can be used for measuring other sensors of following parameter: described parameter for determine close to 0 speed (or being less than predetermined threshold), close to represent idling conditions predetermined threshold engine revolution and/or show or confirm other parameters of driver intention.

Voltage sensor 233 is connected to RESS122, and measures the magnitude of voltage of RESS122.Transceiver 232 receives information (comprising the magnitude of voltage of DC conv 102) from DC conv 102, and being provided for the signal of notification unit 208 (audio portion 250 and/or vision component 252 can be comprised), described notification unit 208 provides suitable alarm for the chaufeur when determining DC conv 102 et out of order for vehicle.

Controller 234 is connected to sensor array 230 and transceiver 232 and instructs the operation comprising the ECS118 of sensor array 230 and transceiver 232.Controller 234 provides the diagnosis to DC conv 102.When controller 234 determines that DC conv 102 exists fault, controller 234 provides alarm to the chaufeur of vehicle further by notification unit 208 and stops the automatic engine shutdown feature of vehicle.In a preferred embodiment, controller 234 performs these function according to the step of the program 300 described further combined with Fig. 3-5 below.

As shown in Figure 2, controller 234 comprises computer system.In some embodiments, what controller 234 also can comprise in sensor array 230, transceiver 232, notification unit 208 and/or its parts is one or more.In addition, should be understood that, controller 234 also may be different from the embodiment shown in Fig. 2.Such as, controller 234 can be connected to or also can adopt one or more remote computer system and/or other control system.

In the embodiment shown, the computer system of controller 234 comprises treater 236, memory device 238, interface 240, memory storage 242 and bus 244.The calculating of treater 236 implementation controller 234 and controlling functions, and the treater of any type or the single integrated circuit of multiple treater, such as microprocessor or collaborative work can be comprised to realize IC apparatus and/or the circuit card of any right quantity of the function of processing unit.During operation, treater 236 performs the one or more programs 245 be included in memory device 238, and so, control the overall operation of the computer system of controller 234 and described controller 234, preferably perform the step of the program 300 of the step-such as composition graphs 3-5 of program described here.

Memory device 238 can be the suitable memory device of any type.It will comprise the dynamic random access memory (DRAM) (DRAM) of various types of such as SDRAM, various types of static RAM (SRAM) (SRAM) and various types of nonvolatile memory (PROM, EPROM and flash memory).In some examples, memory device 238 is positioned at and/or is jointly positioned on identical computer chip with treater 236.In the embodiment shown, memory device 238 stores above mentioned program 245 and for providing one or more storing values 246 of the diagnosis of DC conv 102.

Bus 244 for the computer system at controller 234 various parts between transmission procedure, data, state and other information or signal.Interface 240 allows such as from system drive and/or another computer system communication to the computer system of controller 234, and any suitable method and apparatus can be used to implement.Described interface can comprise one or more network interface in case with other system or parts communication.Interface 240 also can comprise one or more network interface in case with technical personnel communication, and/or one or more memory interface is to be connected to memory storage-such as memory storage 242.

Memory storage 242 can be the memory storage of any suitable type, comprises direct access storage device-such as hard drive, flash memory system, floppy drive and CD-ROM drive.In an illustrative embodiments, memory storage 242 comprises program product, memory device 238 can from this program product receive perform one or more program of the present invention one or more embodiments-such as below further combined with the program 245 of the step of the program 300 of Fig. 3-5 description.In another illustrative embodiments, such as mention below, this program product can directly be stored in memory device 238 and/or CD (such as CD 248), and/or is otherwise stored device 238 and/or CD (such as CD 248) access.

Bus 244 can be connect department of computer science to unify any suitable physics of parts or logic device.This includes but not limited to the connection of direct hardwire, optical fiber, infrared and wireless bus technology.During operation, program 245 to be stored in memory device 238 and to be performed by treater 236.

Should be understood that, although this illustrative embodiments describes in Full Featured computer system background, but those skilled in the art will recognize that, mechanism of the present invention can distribute as program product, described program product has for storage program and instruction and performs the non-provisional computer-readable signal bearing medium of one or more types of its allocating task, such as carry program and comprise computer instruction stored therein with the non-transitory computer readable medium making computer processor (such as treater 236) perform and implement this program.This type of program product can have various forms, and is no matter which kind of particular type for performing the computer-readable signal bearing medium of described allocating task, and the present invention is applicable equally.The example of signal bearing medium comprises: the transmission medium of computer-readable recording medium-such as floppy disk, hard drive, storage card and CD and all sons in full and analog communication link.Should similar understanding be, the computer system of controller 234 also can otherwise be different from the embodiment shown in Fig. 2, and the computer system of such as controller 234 can be connected to or can otherwise adopt one or more remote computer system and/or other control system.

Fig. 3 provides the diagram of circuit of program 300, and this program 300 provides the diagnosis to vehicle DC conv according to illustrative embodiments.Program 300 can be implemented according to the control system 104 of the vehicle 100 of illustrative embodiments composition graphs 1, Fig. 1 and 2 and various parts thereof.

Program 300 comprises the step (step 302) receiving input.During step 302, obtain the input of the driver's operation about vehicle, described input is used for triggering the automatic closedown (stopping) of vehicle motor by auto-stop feature and opening (starting).In one embodiment, the input of step 302 comprises accelerator pedal and/or the brake pedal of chaufeur engaged with vehicle.In various embodiments, other sensors that vehicle data also can be used for using sensor-such as vehicle-wheel speed sensor, engine sensor and/or can be used for measuring following parameter carry out the instruction of certification chaufeur: described parameter for determine close to 0 speed (or being less than predetermined threshold), close to represent idling conditions predetermined threshold engine revolution and/or show or confirm other parameters of driver intention.The input of step 302 is measured preferably by the driver input sensor 231 of Fig. 2, and the signal of this step 302 is sent to the treater 236 of Fig. 2 to process.Step 302 chaufeur input preferably repeat obtain, be most preferably run through continuously described program obtain.

Obtain the magnitude of voltage of chargeable energy storage system (RESS), this system preferably corresponds to the RESS (step 304) of Fig. 1 and 2.During step 304, described magnitude of voltage preferably represents the observed reading of the output voltage of RESS.Described magnitude of voltage is measured preferably by the voltage sensor 233 of the sensor array 230 of the ECS118 of Fig. 1 and 2, and its signal is sent to the treater 236 of Fig. 2 to process.The RESS magnitude of voltage of step 304 preferably repeats to obtain, and is most preferably run through described program continuously to obtain.

Also obtain the magnitude of voltage of DC conv, this DC conv preferably corresponds to the DC conv 102 (step 306) of Fig. 1 and 2.During step 306, described magnitude of voltage preferably represents the observed reading of the output voltage of DC conv 102.Described magnitude of voltage is measured preferably by the voltage sensor 211 of the DC conv 102 of Fig. 1 and 2, and its signal is sent to the treater 236 of Fig. 2 to process.The DC transducer voltage value of step 306 preferably repeatedly obtains, and is most preferably to run through described program continuously to obtain.

Determine whether the driving engine (preferably corresponding to the combustion engine 130 of the vehicle 100 of Fig. 1) of vehicle during light-off period experiences initial start (step 308) for the first time.When the ignition lock 204 of chaufeur index map 2 when light-off period starts just occurs thisly to determine.Thisly determine preferably to be made by the treater 236 of the ECS118 of Fig. 1 and 2.

If determine that driving engine just experiences initial start, the difference (step 310) subsequently between the RESS voltage of calculation procedure 304 and the DC transducer voltage of step 306.During being preferably applied in the initial start of current light-off period driving engine time period of opening first time for each RESS voltage and DC transducer voltage value to calculate described difference.Described difference calculates preferably by the treater 236 of Fig. 2.

Whether the absolute value of the difference of determining step 310 is greater than predetermined threshold (step 312).In a preferred embodiment, the time period of running through step 310 is determined each difference enforcement counted on is this.This predetermined threshold preferably prestores as in the storing value 246 of the memory device 238 of Fig. 2 and is asked for by the treater 236 of Fig. 2 during this step.In a preferred embodiment, described predetermined threshold equals 1 volt.The determination of step 312 is preferably made by the treater 236 of Fig. 2.

If determine that the absolute value of described difference is greater than predetermined threshold in step 312, so error counter increases (step 314).Error counter reflection detects the iterations of DC conv mistake in a step 314.Treater 236 preferably by Fig. 2 increases the mistake counted on.

Consult Fig. 4, the time (x-axis) for vehicle (vehicle 100 of such as Fig. 1) time zone 401 draws voltage (y-axis).Region 401 represents the initial start of the driving engine when light-off period (such as, corresponding to the time period of step 310) starts.If DC conv at initial engine during starts (namely, in the region 401 of Fig. 4) operate rightly, in the wrong boundary so illustrated between lower boundary 414 and coboundary 416 for region 401, DC transducer voltage will approximate greatly the RESS voltage 412 of Fig. 4.This is because DC conv during starts will as voltage circulation device at initial engine.In one example, lower boundary 414 is less than RESS voltage 412 about 1 volt, and coboundary 416 is higher than RESS voltage 412 about 1 volt.

Determine whether DC conv exists fault (step 316) subsequently.In one embodiment, if mistake detected in the iteration of at least predetermined percentage of step 312, so determine to there is fault.Such as, in one embodiment, if at least X in Y the iteration of current initial engine during starts in step 312 detects mistake, so the treater 236 by Fig. 2 is determined that DC conv exists fault.In a this embodiment, if at least 2 in 5 iteration of step 314 middle error counters increase (in the above example " X " equal 2 and " Y " equals " 5 "), determine that DC conv exists fault so in step 316.But this can change in some embodiments, because can change for step 316 above mentioned " X " and " Y " value.In a this embodiment, if error counter increases during any iteration of step 314, so can determine that DC conv exists fault.

If determine that DC conv exists fault in step 316, so provide alarm (step 318).Preferably, the alarm of step 318 is provided by the instruction provided by the treater 236 of Fig. 2 by the notification unit 208 of Fig. 2.Described alarm preferably includes the audible notification (such as audible alarm, buzzer or language description) by audio portion 250 and/or the visual notification by vision component 252 (such as illuminate driving engine and detect lamp or the description of other lamps, flash light or vision).

In addition, if determine that DC conv exists fault and just adopts remedial measures (step 320) in step 316.Described remedial measures performs preferably by the instruction provided by treater 236.As described further below, described remedial measures preferably includes setting Reflector, and described Reflector is for stopping the auto-stop feature of vehicle motor.

After step 320, program turns back to step 308 to determine whether initial engine starting still continues.Treater 236 preferably by Fig. 2 is made this and is determined.If in determining step 312 or 316 determination result of any one be "No" (namely, if if the absolute value of the voltage difference in step 312 is less than or equal to the predetermined threshold of step 312 or determines to there is not fault in step 316), program turns back to step 308 similarly to carry out thisly determining.Repeat step 308-320 in this way, until determined that initial engine starts in the iteration of step 308.

Start once complete initial engine, just determine that driving engine is opened (run through the application and be called " stabilized conditions is opened " condition) (step 322) with steady-state condition.As run through alleged by the application, steady-state condition means following condition: driving engine not to be in the process opened or closed but to have reached the steady-state condition that driving engine opened or closed.Treater 236 preferably by Fig. 2 is made this and is determined.

Difference between the new value of the RESS voltage of calculation procedure 304 and the DC transducer voltage of step 306 subsequently, under the condition of step 322, described new value is determining that driving engine obtains (step 324) after being in stabilized conditions.Under the condition of step 322, preferably run through driving engine and keep the time period of stabilized conditions for each RESS voltage and DC transducer voltage value to calculate described difference.Treater 236 preferably by Fig. 2 calculates described difference.In addition, described difference preferably stores (step 326) in memory.Particularly, during step 326, the voltage difference of step 324 is preferably stored in the memory device 328 of Fig. 2 as in its storing value 246 by the treater 236 of Fig. 2, and described storing value 246 is for calculating the voltage deviation of the following light-off period in the step 376 that further describes below.

The absolute value of the difference of determining step 324 is greater than predetermined threshold (step 328).In a preferred embodiment, the time period of running through step 322 is determined for each difference enforcement calculated is this.Predetermined threshold preferably prestores as in the storing value 246 of the memory device 238 of Fig. 2 and is asked for by the treater 236 of Fig. 2 during this step.In a preferred embodiment, described predetermined threshold equals 1 volt.The determination of step 328 is preferably made by the treater 236 of Fig. 2.

If determine that the absolute value of described difference is greater than predetermined threshold in step 328, so error counter increases (step 330).Error counter reflection detects the iterations of DC conv mistake in step 328.Treater 236 preferably by Fig. 2 increases the mistake counted.

Consult Fig. 5,4 time zones 501,502,503 and 504 voltage (y-axis) for vehicle (vehicle 100 of such as Fig. 1) were plotted relative to the time (x-axis).Each in time after the region 401 (it represents the initial start of driving engine) of Fig. 4 in the region 501-504 of Fig. 5.Region 501 represents the steady-state condition (as being in above-mentioned steps 322) that driving engine has been opened; region 502 represents the transient condition that driving engine is in the bolt down procedure of the auto-stop feature according to vehicle; region 503 represents the buttoned-up steady-state condition of driving engine, and region 504 represents the transient condition that driving engine is in the program of again opening of the auto-stop feature according to vehicle.

Further cf. steps 330, if DC conv operates rightly during region 501, in the wrong boundary so illustrated between lower boundary 514 and coboundary 516 during region 501, DC transducer voltage will approximate greatly the RESS voltage 512 of Fig. 5.This is because DC conv will as voltage circulation device during the steady-state condition in region 501.In one example, lower boundary 514 is less than RESS voltage 512 about 1 volt, and coboundary 516 is higher than RESS voltage 512 about 1 volt.

Determine whether DC conv exists fault (step 332) subsequently.In one embodiment, if mistake detected at least predetermined percentage of the iteration of step 328, so determine to there is fault.Such as, in one embodiment, if detect at least X under the condition of step 322 in Y iteration of step 328 mistake simultaneously driving engine be in stabilized conditions, so the treater 236 by Fig. 2 is made and thisly to determine.In a this embodiment, if at least 2 in 5 iteration of step 330 middle error counters increase (in the above example " X " equal 2 and " Y " equals " 5 "), determine that DC conv exists fault so in step 332.But this can change in some embodiments, because can change for step 332 above mentioned " X " and " Y " value.In a this embodiment, if error counter increases during any iteration of step 330, so can determine that DC conv exists fault.

If determine that DC conv exists fault in step 332, so provide alarm (step 334).Preferably, the alarm of step 334 is provided by the instruction provided by the treater 236 of Fig. 2 by the notification unit 208 of Fig. 2.Described alarm preferably includes the audible notification (such as audible alarm, buzzer or language description) by audio portion 250 and/or the visual notification by vision component 252 (such as illumination lamp, flash light or vision describe).

In addition, if determine that DC conv exists fault and just adopts remedial measures (step 336) in step 332.Described remedial measures performs preferably by the instruction provided by treater 236.As described further below, described remedial measures preferably includes setting error flag, and described error flag is for stopping the auto-stop feature of vehicle motor.

After step 336, program proceeds to step 338 to determine whether there is the condition of automatic engine stop.The chaufeur input of the step 302 obtained based on the driver input sensor 231 by Fig. 2 preferably by the treater 236 of Fig. 2 is made and thisly to be determined.Such as, in one embodiment, when chaufeur engagement brake pedal or throw off the accelerator pedal of vehicle reach enough time time, the condition of automatic engine stop can be there is.If the determination result of determining step 328 or 332 be "No" (namely, if if the absolute value of the voltage difference in step 328 is less than or equal to the predetermined threshold of step 328 or determines to there is not fault in step 332), then program proceeds to step 338 similarly to carry out and thisly to determine.

If determine the condition that there is not automatic engine stop in step 338, so program turns back to step 322, because driving engine keeps stabilized conditions under the condition of step 322.Step 332-338 repeats in this way, until determine the condition that there is automatic engine stop in the iteration of step 338.

Once determine the condition that there is automatic engine stop in the iteration of step 338, determine whether subsequently to set Reflector (step 340).Treater 236 preferably by Fig. 2 is made and thisly to be determined.Particularly, determine whether the treater 236 of Fig. 2 sets mark with regard to following any step: step 316 (describing), step 332 (describing), step 356 (further describing) or step 368 (further describing) above above below below.

If determine in step 340 to have set any mark in these marks, so have disabled the auto-stop feature (because detecting that the DC conv 102 of Fig. 1 and 2 exists fault) of driving engine.Correspondingly, in one embodiment, program turns back to step 322, and driving engine remains on its stabilized conditions under the condition of step 322.In another embodiment, once determine to there is crashed process and/or program just can stop.

On the contrary, if determine in step 340 not set above mentioned any mark, so the auto-stop feature of driving engine is not forbidden (because the DC conv 102 of Fig. 1 and 2 does not detect mistake).Correspondingly, the step 342 of program directly description below proceeding to.

During step 342, driving engine is in the program of the automatic cut out undertaken by the automatic shutdown function of vehicle.At this time durations, along with driving engine is in the program of cut out (or stopping), think that driving engine is in transient condition.And at this time durations, whether the program continuing to determine to kill engine completes (step 344).Treater 236 preferably by Fig. 2 is made and thisly to be determined.Repeat step 342 and 344, until determine that in the iteration of step 344 process killed engine completes, the step 346 directly described below this program proceeds to.

Once complete the automatic closedown (as step 344 is determined) of driving engine, then determine that driving engine cuts out (run through and be also called " stabilized conditions cut out " condition in full) with steady-state condition in step 346.Treater 236 preferably by Fig. 2 is made and thisly to be determined.Difference between the new value of the RESS voltage of calculation procedure 304 and the DC transducer voltage of step 306 subsequently, described new value be determine driving engine be in the stabilized conditions closedown condition of step 346 after (step 348) that obtain.Preferably each RESS voltage of the time period of the stabilized conditions of step 346 closedown condition and DC transducer voltage value is kept to calculate described difference for running through driving engine.Treater 236 preferably by Fig. 2 calculates described difference.In addition, described difference preferably stores (step 350) in memory.Particularly, during step 350, the voltage difference of step 348 is preferably stored in the memory device 238 of Fig. 2 as in its storing value 246 by the treater 236 of Fig. 2, the voltage deviation of following light-off period of described storing value 246 for further describing below calculating in step 376.

Whether the absolute value of the difference of determining step 348 is greater than predetermined threshold (step 352).In a preferred embodiment, each difference calculated for the time period of running through step 346-348 is implemented thisly to determine.This predetermined threshold preferably prestores as in the storing value 246 of the memory device 238 of Fig. 2 and is asked for by the treater 236 of Fig. 2 during this step.In a preferred embodiment, described predetermined threshold equals 1 volt.The determination of step 352 is preferably made by the treater 236 of Fig. 2.

If determine that the absolute value of described difference is greater than predetermined threshold in step 352, so error counter increases (step 354).Error counter reflects the number of times of the iteration of the DC conv mistake detected in step 352.Treater 236 preferably by Fig. 2 increases the mistake counted.

Consult Fig. 5, if DC conv operates rightly during region 503, in the wrong boundary so illustrated between lower boundary 524 and coboundary 526 during the region 503 of Fig. 5, DC transducer voltage will approximate greatly the RESS voltage 512 of Fig. 2.This is because DC conv 102 will as voltage circulation device during the steady-state condition in region 503.In one example, lower boundary 524 is less than RESS voltage 512 about 1 volt, and coboundary 526 is higher than RESS voltage 512 about 1 volt.

Determine whether DC conv exists fault (step 356) subsequently.In one embodiment, if mistake detected at least predetermined percentage of the iteration of step 352, so determine to there is fault.Such as, in one embodiment, if driving engine is in the stabilized conditions cut out condition of step 342 while of mistake being detected at least X in Y iteration of step 352, so the treater 236 by Fig. 2 is determined that DC conv exists fault.In a this embodiment, if at least 2 in 5 iteration of step 354 middle error counters increase (in the above example " X " equal 2 and " Y " equals " 5 "), in step 356, so determine that DC conv exists fault.But this can change in some embodiments, because can change for step 356 above mentioned " X " and " Y " value.In a this embodiment, if error counter increases during any iteration of step 354, so can determine that DC conv exists fault.

If determine that in step 356 DC conv exists fault, so provide alarm (step 358).Preferably, the alarm of step 358 is that the instruction provided by the treater 236 of Fig. 2 by the notification unit 208 of Fig. 2 is provided.Described alarm preferably includes the audible notification (such as audible alarm, buzzer or language description) by audio portion 250 and/or the visual notification by vision component 252 (such as illumination lamp, flash light or vision describe).

In addition, if determine that in step 356 DC conv exists fault and just adopts remedial measures (step 360).Described remedial measures performs preferably by the instruction provided by treater 236.As described further below, described remedial measures preferably includes setting error flag, and described error flag is for stopping the auto-stop feature of vehicle motor.

After step 360, program proceeds to step 362 to determine whether there is the condition of automatic engine start.Step 362 this is determined preferably to be made based on the chaufeur input of step 302 by the treater 236 of Fig. 2.Such as, in one embodiment, when the accelerator pedal of chaufeur disengage brake pedal or engaged with vehicle reaches enough time, the condition of automatic engine start can be there is.If the determination result of determining step 352 or 356 be "No" (namely, if if the absolute value of the voltage difference in step 352 is less than or equal to the predetermined threshold of step 356 or determines to there is not fault in step 356), then program proceeds to step 362 similarly to carry out thisly determining.

If determine the condition that there is not automatic engine start in step 362, so program turns back to the step 374 further described below.On the contrary, if determine to there is engine auto start conditions in step 362, then the step 364 of program directly description below proceeding to.

During step 364, driving engine is opened automatically (or starting).And at this time durations, determine whether the program opening driving engine (that is, fire an engine) completes.Treater 236 preferably by Fig. 2 is made these and is determined.If determine that the automatic starting of driving engine completes at any time, program proceeds to above-mentioned steps 322 subsequently.On the contrary, as long as the automatic starting of driving engine does not complete, the step 365 directly described below program just proceeds to.

During step 365, when driving engine is in the program automatically opened, the difference between multiple values of the DC transducer voltage of the step 306 of computation and measurement and reception.Preferably run through driving engine to continue to calculate these poor (although this function is all described as " auto-stop " function in the various time in this article, should be understood that this function also makes driving engine again automatically return to open mode as required) by the time period that the automatic function of driving engine is opened automatically.At this time durations, when driving engine is in the program opened, think that driving engine is in transient condition.In addition, at the time durations that driving engine is opened automatically, the DC conv 102 of Fig. 1 and 2 makes the voltage of the RESS122 of Fig. 1 and 2 raise, to keep constant potential-preferably to equal the amount of the RESS voltage just in time before automatic engine start starts at this time durations.

Determine whether that any difference of step 365 (that is, when driving engine is in automatic starting procedure) is all greater than predetermined threshold (step 366).In a preferred embodiment, each difference calculated for the time period of running through step 365 is made and thisly to be determined.Predetermined threshold preferably prestores as in the storing value 246 of the memory device 238 of Fig. 2 and is asked for by the treater 236 of Fig. 2 during this step.In a preferred embodiment, described predetermined threshold equals 1 volt.The determination of step 366 is preferably made by the treater 236 of Fig. 2.

If determine that in step 366 absolute value of described difference is greater than predetermined threshold, so error counter increases (step 367).Error counter is reflected in step 366 number of times of the iteration detecting DC conv mistake.Treater 236 preferably by Fig. 2 increases the mistake counted.

Consult Fig. 5, if DC conv operates rightly during region 504, so regardless of RESS voltage 512, DC transducer voltage will keep constant between lower boundary 534 and coboundary 536, and described lower boundary 524 and described coboundary 526 represent the accepted border of mistake during region 504.This is because DC conv provides the voltage of constant level (the voltage enhanced feature due to above-mentioned DC conv) by being in starting procedure along with driving engine.The voltage of described constant level will approximate greatly the RESS voltage 512 just in time starting the time point 540 before automatic fire an engine in program.In one example, lower boundary 534 is less than the RESS voltage 512 of time 540 about 1 volt, and coboundary 536 is than high about 1 volt of the RESS voltage 512 of time 540.

Determine whether DC conv exists fault (step 368) subsequently.In one embodiment, if mistake detected at least predetermined percentage of the iteration of step 366, so determine to there is fault.Such as, in one embodiment, if driving engine is in the transient state starting conditions of step 365 while of mistake being detected at least X in Y iteration of step 366, so the treater 236 by Fig. 2 is determined that DC conv exists fault.In a this embodiment, if at least 2 in 5 iteration of step 367 middle error counters increase (in the above example " X " equal 2 and " Y " equals " 5 "), in step 368, so determine that DC conv exists fault.But this can change in some embodiments, because can change for step 368 above mentioned " X " and " Y " value.In a this embodiment, if error counter increases during any iteration of step 367, so can determine that DC conv exists fault.

If determine that in step 368 DC conv exists fault, so provide alarm (step 370).Preferably, the alarm of step 370 is that the instruction provided by the treater 236 of Fig. 2 by the notification unit 208 of Fig. 2 is provided.Described alarm preferably includes the audible notification (such as audible alarm, buzzer or language description) by audio portion 250 and/or the visual notification by vision component 252 (such as illumination lamp, flash light or vision describe).

In addition, if determine that in step 368 DC conv exists fault and just adopts remedial measures (step 372).The instruction that described remedial measures provides preferably by treater 236 performs.As described further below, described remedial measures preferably includes setting error flag, and described error flag is for stopping the auto-stop feature of vehicle motor.After step 372, program proceeds to step 364 to determine whether the automatic starting procedure of driving engine completes in addition.Repeat step 364-372 in this way until complete automatic starting procedure, turn back to above-mentioned steps 322 in the described program of this point.

Consult above-mentioned steps 362 again, if determine in step 362 condition that there is not automatic engine start, then determine whether firing unit closes (step 374).In a preferred embodiment, thisly determine to determine whether the ignition lock 204 of Fig. 2 is closed by the chaufeur of vehicle by the treater 236 of Fig. 2.Preferably run through light-off period to continue to make and thisly to determine.

If determine that in step 374 firing unit does not cut out, so program proceeds to step 346, and determines that driving engine is in stabilized conditions and cuts out condition.Repeat step 346-374 subsequently until determine that firing unit cuts out in the iteration subsequently of step 374.

Once determine that firing unit cuts out in the iteration of step 374, calculating voltage deviation (step 376) subsequently.Described voltage deviation preferably calculates based on the voltage difference from step 324-326 and 348-350 (that is, when driving engine is in steady-state condition).Described voltage deviation is preferably implemented in light-off period subsequently.In some embodiments, voltage deviation uses the aviation value from crossing over the step 324-326 of multiple light-off period and the voltage difference of 348-350 to calculate.In addition, in some embodiments, described voltage deviation can calculate and/or upgrade in step 376 so that (such as, if calculate described voltage deviation in the light-off period earlier before firing unit cuts out) applies during current light-off period when the light-off period without the need to waiting for subsequently.

In one embodiment, average between the voltage deviation reflection RESS voltage of step 304 of step 376 and the DC transducer voltage of step 306 or estimates poor, described average or expectation is poor such as can cause different sensors mistake for the DC conv 102 of Fig. 1 and 2 and the relevant voltage sensor 211,233 of ECS118 or adjustment.Such as, in a this embodiment, if DC voltage larger than RESS voltage 1/2nd volts all the time, so can respectively to step 310,324, the poor computing value of 348 and 365 or respectively to step 312,328, the corresponding determined value of 352 and 366 adds the adjustment factor of 1/2nd volts.

Consult Figure 4 and 5, described voltage deviation can be implemented in conjunction with the adjustment value of lower boundary 414,514,524,534 and/or coboundary 416,516,526,536.Such as, in one embodiment, if DC voltage is higher than RESS voltage 1/2nd volts all the time, each so in lower boundary 414,514,524,534 and coboundary 416,516,526 and 536 moves down 1/2nd volts.In addition, in some embodiments, precision and confidence level is increased by the deviation in use and comparison step 376, wrong boundary or the gap (such as, making the distance between each corresponding to it coboundary 416,516,526,536 in lower boundary 414,514,524,534 be less than 2 volts) between corresponding border 414-416,514-516,524-526 and 534-536 can be reduced.

Preferably by the voltage deviation of treater 236 calculation procedure 376 of Fig. 2.Should be understood that, implement, in pattern (such as, the voltage difference wherein from step 324-326 and 348-350 is in close proximity to 0), can not voltage deviation be adopted at some embodiment and/or at some.After calculating voltage deviation, described voltage deviation to be stored in the memory device 238 of Fig. 2 to implement (step 378)-preferably in light-off period subsequently, and program preferably stops current light-off period subsequently.But as mentioned above, in some embodiments, described voltage deviation can earlier calculate in a program and use in identical light-off period.

Correspondingly, the invention provides as vehicle DC conv provides the method for the improvement of diagnosis, program product, system and vehicle.The method of described improvement, program product, system and vehicle provide DC converter failure to test based on engine condition (such as, whether driving engine is in that stabilized conditions opens condition, stabilized conditions closes conditioned disjunction and be in opening procedure) and the magnitude of voltage of RESS and/or DC conv.If determine that DC conv exists mistake, then suitable alarm is provided and stops the automatic shutdown function of driving engine.

Should be understood that, disclosed method, system and vehicle can be different from shown in accompanying drawing and described here those.Such as, vehicle 100, DC conv 102, control system 104, RESS122, combustion engine 130 and/or its various parts can be different from shown in Fig. 1 and 2 and to describe in conjunction with their those.In addition, should be understood that, some step (and/or enforcement pattern of Figure 4 and 5) of program 300 can be different from shown in accompanying drawing and/or to describe in conjunction with their those.Should understand similarly, some step of said procedure (and/or subprogram or its sub-step) can perform simultaneously or with from shown in accompanying drawing and/or the different order described in conjunction with it above occur.

Although provided at least one illustrative embodiments in the detailed description of the invention above, should be understood that also there is a large amount of modification.Should be understood that equally, described one or more illustrative embodiments is only example, and not for limiting the scope of the invention by any way, apply or configuring.On the contrary, detailed description of the invention above will provide the convenient scheme circuit implementing described one or more illustrative embodiments to those skilled in the art.Should be understood that, when not departing from the scope of the present invention that claims and law equivalents thereof limit, various change can be made to the function of element and layout.

Claims

1., for controlling a method for the driving engine of the vehicle with direct current transducer, wherein said driving engine opens and closes based on chaufeur input automatically according to auto-stop feature, and described method comprises:

Determine the state of described driving engine;

Direct current transducer voltage is received from described direct current transducer; And

There is provided the diagnosis of direct current transducer fault based on the state of described driving engine and described direct current transducer voltage by treater and optionally forbid the auto-stop feature of driving engine.

2. the method for claim 1, wherein said vehicle comprises chargeable energy storage system further, and described method comprises further:

Measure chargeable energy storage system voltage, wherein provide the diagnosis of direct current transducer fault and the step optionally forbidding the auto-stop feature of driving engine comprises and determines that direct current transducer exist fault and forbid described auto-stop feature based on direct current transducer voltage with comparing of chargeable energy storage system voltage when driving engine is in steady-state condition.

3. method as claimed in claim 2, comprises further:

If be greater than predetermined threshold based on the described absolute value comparing the difference determined between direct current transducer voltage and chargeable energy storage system voltage, then forbid auto-stop feature.

4. method as claimed in claim 3, comprises the steps: further

5. the method for claim 1, wherein:

The step receiving direct current transducer voltage be included in engine automatic stop after automatic engine start during, within the time period that engine starting and direct current transducer provide voltage to promote, receive multiple direct current transducer magnitude of voltage; And

There is provided during diagnosing the step also optionally forbidding the auto-stop feature of driving engine to be included in the described time period and determine that direct current transducer exists fault and forbids auto-stop feature based on the difference between direct current transducer magnitude of voltage.

6. method as claimed in claim 5, wherein said method comprises further:

If the absolute value of the difference between direct current transducer magnitude of voltage is greater than predetermined threshold, then forbid auto-stop feature.

7. the method for claim 1, wherein said vehicle comprises chargeable energy storage system further, and described method comprises further:

Measure chargeable energy storage system voltage, wherein provide diagnosis and the step optionally forbidding the auto-stop feature of driving engine comprises first time during the current light-off period of driving engine at vehicle is determined that direct current transducer exist fault and forbid auto-stop feature based on direct current transducer voltage with comparing of chargeable energy storage system voltage by during starting.

8. method as claimed in claim 7, comprises further:

9. for controlling a system for the driving engine of vehicle, this vehicle has direct current transducer, and wherein said driving engine automatically opens and closes based on chaufeur input according to auto-stop feature, described system configuration become at least can:

Determine the state of described driving engine;

There is provided the diagnosis of direct current transducer fault based on engine condition and direct current transducer voltage and optionally forbid the auto-stop feature of driving engine.

10. system as claimed in claim 9, wherein said vehicle comprises chargeable energy storage system further, and the system of the described driving engine for controlling vehicle be configured to further at least can:

Measure chargeable energy storage system voltage;

Comparing of direct current transducer voltage and chargeable energy storage system voltage is produced when driving engine is in steady-state condition; And

If be greater than predetermined threshold based on the described absolute value comparing the difference determined between direct current transducer voltage and chargeable energy storage system voltage, then determine that direct current transducer exists fault and forbids auto-stop feature.

11. systems as claimed in claim 9, wherein said system be configured to further at least can:

Multiple direct current transducer magnitude of voltage is received by time period of starting during automatic engine start after engine automatic stop, at driving engine;

The difference between direct current transducer magnitude of voltage is determined during the described time period; And

If the absolute value of the difference between direct current transducer magnitude of voltage is greater than predetermined threshold, then determine that direct current transducer exists fault and forbids auto-stop feature.

12. systems as claimed in claim 9, wherein said vehicle comprises chargeable energy storage system further, and the system of the described driving engine for controlling vehicle be configured to further at least can:

Measure chargeable energy storage system voltage;

Comparing of direct current transducer voltage and chargeable energy storage system voltage is produced when first time is started during the current light-off period of driving engine at vehicle; And

13. 1 kinds of vehicles, comprising:

At least can open the chargeable energy storage system of described driving engine;

Be connected to the direct current transducer of described chargeable energy storage system; And

Controller, described controller is connected to described direct current transducer and is configured to:

Determine the state of described driving engine;

Based on described driving engine and described direct current transducer voltage for described direct current transducer provides diagnosis, and optionally forbid the auto-stop feature of driving engine.

14. vehicles as claimed in claim 13, wherein said controller is configured to further:

Measure chargeable energy storage system voltage; And

Comparing when driving engine is in steady-state condition based on direct current transducer voltage and chargeable energy storage system voltage, the diagnosis of direct current transducer fault is provided and optionally forbids the auto-stop feature of driving engine.

15. vehicles as claimed in claim 14, if wherein said controller is configured to be greater than predetermined threshold based on the described absolute value comparing the difference determined between direct current transducer voltage and chargeable energy storage system voltage further, then forbid auto-stop feature.

16. vehicles as claimed in claim 15, wherein said controller is configured to further:

17. vehicles as claimed in claim 13, wherein said controller is configured to further:

Multiple direct current transducer magnitude of voltage is received by time period of starting during automatic engine start after engine automatic stop, at driving engine; And

During the described time period, provide the diagnosis of direct current transducer fault based on the difference between direct current transducer magnitude of voltage and optionally forbid the auto-stop feature of driving engine.

18. vehicles as claimed in claim 17, if the absolute value of difference that wherein said controller is configured between direct current transducer magnitude of voltage is further greater than predetermined threshold, then forbid auto-stop feature.

19. vehicles as claimed in claim 13, wherein said controller is configured to further:

Measure chargeable energy storage system voltage; And

The auto-stop feature providing the diagnosis of direct current transducer fault also optionally to forbid driving engine is compared based on direct current transducer voltage and chargeable energy storage system voltage when first time starts during the current light-off period of driving engine at vehicle.

20. vehicles as claimed in claim 19, if wherein said controller is configured to be greater than predetermined threshold based on the described absolute value comparing the difference determined between direct current transducer voltage and chargeable energy storage system voltage further, then forbid auto-stop feature.